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https://www.readbyqxmd.com/read/28329760/low-temperature-hydrogen-production-from-water-and-methanol-using-pt-%C3%AE-moc-catalysts
#1
Lili Lin, Wu Zhou, Rui Gao, Siyu Yao, Xiao Zhang, Wenqian Xu, Shijian Zheng, Zheng Jiang, Qiaolin Yu, Yong-Wang Li, Chuan Shi, Xiao-Dong Wen, Ding Ma
Polymer electrolyte membrane fuel cells (PEMFCs) running on hydrogen are attractive alternative power supplies for a range of applications, with in situ release of the required hydrogen from a stable liquid offering one way of ensuring its safe storage and transportation before use. The use of methanol is particularly interesting in this regard, because it is inexpensive and can reform itself with water to release hydrogen with a high gravimetric density of 18.8 per cent by weight. But traditional reforming of methanol steam operates at relatively high temperatures (200-350 degrees Celsius), so the focus for vehicle and portable PEMFC applications has been on aqueous-phase reforming of methanol (APRM)...
March 22, 2017: Nature
https://www.readbyqxmd.com/read/28321449/catalysts-of-self-assembled-pt-ceo2-%C3%AE-rich-core-shell-nanoparticles-on-3d-ordered-macroporous-ce1-xzrxo2-for-soot-oxidation-nanostructure-dependent-catalytic-activity
#2
Yuechang Wei, Jinqing Jiao, Xindong Zhang, Baofang Jin, Zhen Zhao, Jing Xiong, Yazhao Li, Jian Liu, Jianmei Li
The catalytic performance in heterogeneous catalytic reactions consisting of solid reactants is strongly dependent on the nanostructure of the catalysts. Metal-oxides core-shell (MOCS) nanostructures have potential to enhance the catalytic activity for soot oxidation reactions as a result of optimizing the density of active sites located at the metal-oxide interface. Here, we report a facile strategy for fabricating nanocatalysts with self-assembled Pt@CeO2-δ-rich core-shell nanoparticles (NPs) supported on three-dimensionally ordered macroporous (3DOM) Ce1-xZrxO2via the in situ colloidal crystal template (CCT) method...
March 21, 2017: Nanoscale
https://www.readbyqxmd.com/read/28320044/multiple-concomitant-oral-cavity-cancers-incidence-management-and-outcomes
#3
Huang-Kai Kao, Mohamed Abdelrahman, Yenlin Huang, Chia-Hsuan Tsai, Megias J Barrera, Ngan-Ming Tsang, Adam J Couves, Ming-Huei Cheng, Kai-Ping Chang
BACKGROUND: Little is known about the appropriate treatment and long-term survival of patients with multiple concomitant oral cavity cancers (MOC). The aim of this study was to clarify the clinicopathological features of MOC, to compare the prognosis of MOC patients with that of patients with single oral cavity cancers (SOC), and to describe reconstructive options based on the concept of economy in autologous tissue transfer. METHODS: Data from 603 patients diagnosed with at least one squamous cell carcinoma of the oral cavity who underwent surgery for primary oral cavity cancers between 2006 and 2014 were reviewed retrospectively to identify MOC patients...
March 20, 2017: Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28318248/ultrastable-1d-europium-complex-for-simultaneous-and-quantitative-sensing-of-cr-iii-and-cr-vi-ions-in-aqueous-solution-with-high-selectivity-and-sensitivity
#4
Jingjuan Liu, Guanfeng Ji, Jiannan Xiao, Zhiliang Liu
A unique metal-organic complex (MOC) with formula [Eu2(tpbpc)4·CO3·4H2O]·DMF·solvent (Htpbpc = 4'-[4,2';6',4″]-terpyridin-4'-yl-biphenyl-4-carboxylic acid) has been successfully constructed under solvothermal conditions. The Eu complex, as proved by structural analysis, exhibits a fascinating 1D linear-type chain structure which is further extended to a 3D H-bonded supramolecular framework. The luminescent investigations confirm that the emission behavior of the Eu complex possesses excellent water stability and pH stability, and it is the first example of a MOC-based fluorescent probe with high selectivity, high sensitivity, and low detection limit, targeting Cr(III) and Cr(VI) (CrO4(2-)/Cr2O7(2-)) ions in aqueous solution...
March 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28315410/is-lymphadenectomy-necessary-in-mucinous-ovarian-cancer-a-single-institution-experience
#5
Ivan Salgado-Ceballos, Jazmín Ríos, Delia Pérez-Montiel, Lenny Gallardo, Salim Barquet-Muñoz, Rosa Salcedo-Hernández, Carlos Pérez-Plasencia, Luis Alonso Herrera, David Francisco Cantú de León
BACKGROUND: According to the International Federation of Gynecology and Obstetrics (FIGO) guidelines, every patient diagnosed with ovarian cancer (OC) should undergo a complete staging procedure to adequately assess tumor spread. The role of lymphadenectomy in the initial management of primary early mucinous ovarian cancer (MOC) remains unclear. OBJECTIVE: To describe the prevalence of pelvic and para-aortic node metastases in MOC. MATERIALS AND METHODS: The records of patients with MOC treated at our Institute during January 2005 to December 2011 were assessed...
March 14, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28303411/identifying-the-origin-of-effects-of-contralateral-noise-on-transient-evoked-otoacoustic-emissions-in-unanesthetized-mice
#6
Yingyue Xu, Mary Ann Cheatham, Jonathan H Siegel
Descending neural pathways in the mammalian auditory system are known to modulate the function of the peripheral auditory system. These pathways include the medial olivocochlear (MOC) efferent innervation to outer hair cells (OHCs) and the acoustic reflex pathways mediating middle ear muscle (MEM) contractions. Based on measurements in humans (Marks and Siegel, companion paper), we applied a sensitive method to attempt to differentiate MEM and MOC reflexes using contralateral acoustic stimulation in mice under different levels of anesthesia...
March 16, 2017: Journal of the Association for Research in Otolaryngology: JARO
https://www.readbyqxmd.com/read/28296248/sulfur-doped-porphyrinic-carbon-nanostructures-synthesized-by-amorphous-mos2-for-oxygen-reduction-reaction-in-an-acid-medium
#7
Hyun-Suk Park, Sang-Beom Han, Da-Hee Kwak, Gyu-Ho Lee, In-Ae Choi, Do-Hyoung Kim, Kyeng-Bae Ma, Min-Cheol Kim, Kyung-Won Park
To develop doped carbon nanostructures as non-precious metal cathode catalysts, we synthesize the nanocomposites using SBA-15 and 5,10,15,20-tetrakis(4-methoxyphenyl)-porphyrin-Fe(III) chloride with different ratios of amorphous MoS2 precursor. From various analyses, it was found that during the pyrolysis at 900 oC under an N2 atmosphere, the amorphous MoS2 precursor was decomposed into Mo and S, facilitating the formation of graphene sheet-like carbon with MoC and doping of sulfur in the carbon. Especially, in the case of Mo/S/C-10, most of the 10 wt% MoS2 precursor was decomposed, thus forming S-doped carbon which was grown on MoC phase without crystalline MoS2 phase...
March 15, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28248731/aberrant-cytokeratin-20-reactivity-in-epithelioid-malignant-mesothelioma-a-case-report
#8
Rashmi Manur, Ihab Lamzabi
Malignant mesothelioma is an uncommon neoplasm that should be distinguished from the more common pulmonary adenocarcinomas and other metastatic lesions. Although diagnosis is based on morphologic features, immunohistochemical stains such as Calretinin, WT-1, CK-5/6, D2-40, Ber-Ep4, and MOC-31 are routinely used. Other organ-specific immunohistochemical markers are used when metastases from unknown primary lesion is suspected clinically. Here, we report a case of pleural epithelioid malignant mesothelioma expressing CK20...
February 28, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28238591/attitudes-and-experiences-of-early-and-midcareer-pediatricians-with-the-maintenance-of-certification-process
#9
Bobbi J Byrne, Mary Pat Frintner, Heather N Abraham, Amy J Starmer
OBJECTIVE: Maintenance of certification (MOC) value and relevance have been recent topics of controversy and discussion in medicine. Systematically assessing pediatrician's attitudes and experiences to encourage and inform future modifications is important. METHODS: We surveyed 866 pediatricians in 2014 who graduated from residency 10 to 12 years ago and are part of a larger longitudinal study. Cross-sectional quantitative and qualitative data on understanding, attitudes, barriers, and needs specific to MOC part 2 (self-assessment/continued learning activities) and part 4 (quality improvement projects) were analyzed...
February 23, 2017: Academic Pediatrics
https://www.readbyqxmd.com/read/28225022/core-shell-nanoparticle-arrays-double-the-strength-of-steel
#10
J-B Seol, S-H Na, B Gault, J-E Kim, J-C Han, C-G Park, D Raabe
Manipulating structure, defects and composition of a material at the atomic scale for enhancing its physical or mechanical properties is referred to as nanostructuring. Here, by combining advanced microscopy techniques, we unveil how formation of highly regular nano-arrays of nanoparticles doubles the strength of an Fe-based alloy, doped with Ti, Mo, and V, from 500 MPa to 1 GPa, upon prolonged heat treatment. The nanoparticles form at moving heterophase interfaces during cooling from the high-temperature face-centered cubic austenite to the body-centered cubic ferrite phase...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28218524/general-fabrication-of-boride-carbide-and-nitride-nanocrystals-via-a-metal-hydrolysis-assisted-process
#11
Ling Zhou, Lishan Yang, Li Shao, Bo Chen, Fanhui Meng, Yitai Qian, Liqiang Xu
Metal boride, carbide, and nitride materials are useful owing to their wide variety of interesting chemical and physical properties. However, the synthesis of these materials with nano or mesoscale sizes is challenging due to the usually required high temperatures and long reaction durations. To our knowledge, the exploration of a number of simultaneous chemical reactions through rapid synthesis still remains a great challenge. In this study, a general route for the reduction and transformation of metal oxides into related metal boride (TiB2, MoB2, DyB4, ErB4, YB4, LaB6, CeB6, SmB6, EuB6), carbide (SiC, TiC, VC, WC, W2C, ZrC, MoC, NbC), and nitride (TiN, VN, BN, AlN, CrN, MgSiN2) nanocrystals were achieved at 150 °C...
February 20, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28216123/ablation-of-the-auditory-cortex-results-in-changes-in-the-expression-of-neurotransmission-related-mrnas-in-the-cochlea
#12
Verónica Lamas, José M Juiz, Miguel A Merchán
The auditory cortex (AC) dynamically regulates responses of the Organ of Corti to sound through descending connections to both the medial (MOC) and lateral (LOC) olivocochlear efferent systems. We have recently provided evidence that AC has a reinforcement role in the responses to sound of the auditory brainstem nuclei. In a molecular level, we have shown that descending inputs from AC are needed to regulate the expression of molecules involved in outer hair cell (OHC) electromotility control, such as prestin and the α10 nicotinic acetylcholine receptor (nAchR)...
March 2017: Hearing Research
https://www.readbyqxmd.com/read/28211069/mglur1-enhances-efferent-inhibition-of-inner-hair-cells-in-the-developing-rat-cochlea
#13
Zhanlei Ye, Juan D Goutman, Sonja J Pyott, Elisabeth Glowatzki
Just before the onset of hearing, the inner hair cells (IHCs) receive inhibitory efferent input from cholinergic medial olivocochlear (MOC) neurons originating in the brainstem. This input may serve a role in the maturation of the ascending (afferent) auditory system by inhibiting spontaneous activity of the IHCs. To investigate the molecular mechanisms regulating these IHC efferent synapses, we combined electrical stimulation of the efferent fibres with patch clamp recordings from the IHCs to measure efferent synaptic strength...
February 17, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28209346/reliability-of-tms-phosphene-threshold-estimation-toward-a-standardized-protocol
#14
Chiara Mazzi, Silvia Savazzi, Arman Abrahamyan, Manuela Ruzzoli
BACKGROUND: Phosphenes induced by transcranial magnetic stimulation (TMS) are a subjectively described visual phenomenon employed in basic and clinical research as index of the excitability of retinotopically organized areas in the brain. OBJECTIVE: Phosphene threshold estimation is a preliminary step in many TMS experiments in visual cognition for setting the appropriate level of TMS doses; however, the lack of a direct comparison of the available methods for phosphene threshold estimation leaves unsolved the reliability of those methods in setting TMS doses...
February 2, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28188882/intelligibility-in-speech-maskers-with-a-binaural-cochlear-implant-sound-coding-strategy-inspired-by-the-contralateral-medial-olivocochlear-reflex
#15
Enrique A Lopez-Poveda, Almudena Eustaquio-Martín, Joshua S Stohl, Robert D Wolford, Reinhold Schatzer, José M Gorospe, Santiago Santa Cruz Ruiz, Fernando Benito, Blake S Wilson
We have recently proposed a binaural cochlear implant (CI) sound processing strategy inspired by the contralateral medial olivocochlear reflex (the MOC strategy) and shown that it improves intelligibility in steady-state noise (Lopez-Poveda et al., 2016, Ear Hear 37:e138-e148). The aim here was to evaluate possible speech-reception benefits of the MOC strategy for speech maskers, a more natural type of interferer. Speech reception thresholds (SRTs) were measured in six bilateral and two single-sided deaf CI users with the MOC strategy and with a standard (STD) strategy...
February 7, 2017: Hearing Research
https://www.readbyqxmd.com/read/28145032/national-treatment-programme-of-hepatitis-c-in-egypt-hepatitis-c-virus-model-of-care
#16
REVIEW
W El-Akel, M H El-Sayed, M El Kassas, M El-Serafy, M Khairy, K Elsaeed, K Kabil, M Hassany, A Shawky, A Yosry, M K Shaker, Y ElShazly, I Waked, G Esmat, W Doss
Hepatitis C virus (HCV) infection is a major health problem in Egypt as the nation bears the highest prevalence rate worldwide. This necessitated establishing a novel model of care (MOC) to contain the epidemic, deliver patient care and ensure global treatment access. In this review, we describe the process of development of the Egyptian model and future strategies for sustainability. Although the magnitude of the HCV problem was known for many years, the HCV MOC only came into being in 2006 with the establishment of the National Committee for Control of Viral Hepatitis (NCCVH) to set up and implement a national control strategy for the disease and other causes of viral hepatitis...
February 1, 2017: Journal of Viral Hepatitis
https://www.readbyqxmd.com/read/28125363/evaluation-of-the-asco-value-framework-for-anticancer-drugs-at-an-academic-medical-center
#17
Leslie Wilson, Tracy Lin, Ling Wang, Tanuja Patel, Denise Tran, Sarah Kim, Katie Dacey, Courtney Yuen, Lisa Kroon, Bret Brodowy, Kevin Rodondi
BACKGROUND: Anticancer drug prices have increased by an average of 12% each year from 1996 to 2014. A major concern is that the increasing cost and responsibility of evaluating treatment options are being shifted to patients. This research compared 2 value-based pricing models that were being considered for use at the University of California, San Francisco (UCSF) Medical Center to address the growing burden of high-cost cancer drugs while improving patient-centered care. PROGRAM DESCRIPTION: The Medication Outcomes Center (MOC) in the Department of Clinical Pharmacy, University of California, San Francisco (UCSF), School of Pharmacy focuses on assessing the value of medication-related health care interventions and disseminating findings to the UCSF Medical Center...
February 2017: Journal of Managed Care & Specialty Pharmacy
https://www.readbyqxmd.com/read/28118038/quality-metrics-currently-used-in-academic-radiology-departments-results-of-the-qualmet-survey
#18
Eric A Walker, Jonelle M Petscavage-Thomas, Joseph S Fotos, Michael A Bruno
OBJECTIVES: We present the results of the 2015 QUALMET survey, which was designed to assess the commonalities and variability of selected quality and productivity metrics currently employed by a large sample of academic radiology departments representing all regions in the United States. METHODS: The survey of key radiology metrics was distributed in March-April of 2015 via personal e-mail to 112 academic radiology departments. RESULTS: There was a 34...
January 24, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28102467/mypod-an-emr-based-tool-that-facilitates-quality-improvement-and-maintenance-of-certification
#19
Loren Berman, Brian Duffy, B Randall Brenn, Charles Vinocur
Maintenance of Certification (MOC) was designed to assess physician competencies including operative case volume and outcomes. This information, if collected consistently and systematically, can be used to facilitate quality improvement. Information automatically extracted from the electronic medical record (EMR) can be used as a prompt to compile these data. We developed an EMR-based program called MyPOD (My Personal Outcomes Data) to track surgical outcomes at our institution. We compared occurrences reported in the first 18 months to those captured in the American College of Surgeons National Surgical Quality Improvement Program-Pediatric (ACS NSQIP-P) over the same time period...
March 2017: Journal of Medical Systems
https://www.readbyqxmd.com/read/28094531/cyanoform-and-its-isomers-relative-stabilities-spectroscopic-features-and-rearrangements-by-coupled-cluster-and-mcscf-based-methods
#20
Marek Szczepaniak, Jerzy Moc
Although an isolation of elusive tricyanomethane HC(CN)3 was recently reported, the existence of other HC4N3 species has yet to be confirmed. In this work, the relative stabilities, spectroscopic features, and rearrangements of tricyanomethane and its four isomers are examined using single- (CCSD(T), CCSD(T)-F12) and multireference (MCSCF, MRPT2) methods. Tricyanomethane and dicyanoketenimine (NC)2CCNH, which are found to be the two most stable HC4N3 isomers lying within 9 kcal/mol, can be discriminated by their spectroscopic parameters...
February 6, 2017: Journal of Physical Chemistry. A
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